20130510SW

Friday Warmup: Airplanes (2013-05-10)

Airplanes and helicopters balance four forces when they are cruising, and then unbalance the forces when they need to change their speed. Here we will remind ourselves how to balance and unbalance the forces.


Using the simulation linked to the image, get the helicopter to go diagonally upward at a steady speed. (We call this dynamic equilibrium.)

To get credit for this exercise,

• take a screenshot of the helicopter;
• annotate it by showing that it is in equilibrium AND has a steady speed;
• Choose file, and Submit!

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Friday Exercise: Forces of Flight (2013-05-10)

There are four forces on a plane that need to be balanced OR unbalanced, depending on the situation. You may be surprised to learn all the different situations when they are actually balanced!


Follow the image/link above to take the Quia quiz on the Four Forces of Flight.

To get credit for this exercise,

• take a screenshot of the page showing your perfect score;
• annotate it by listing the three times that a plane has balanced forces;
• Choose File, and Submit!